Question

If the period of a wave is 15 seconds, how many wavelengths pass a certain point in 2 minutes?

Answer 1

Hello
The period of a wave is the time it takes between two complete oscillations of the wave itself, i.e. it is the time that occurs between two consecutive wavelengths. Therefore, if we want to calculate how many wavelengths pass a certain point in
`t=2~min=120~s`, we need to divide the total time for the period of the wave, T:

`N= (t)/(T)= (120~s)/(15~s)=8`
So, the answer is 8 wavelengths.